Ahhh, sorry to hear this.
I'll be honest with you, there have come times in my project where I've felt the same way. The pressure I've put on myself to hit self-imposed deadlines to to meet my preconceived notions of how long a restoration should take really wore on my for a while. It's frustrating when you feel like you're never doing as well as you should - and that takes a lot of fun out of it.
In the past few years I've taken a different view of things. I've thrown all deadlines and ideas of when I want to be done out the window and accepted that the project will simply take as long as my available free time and budget allow. It's been a change for the better. Recently I've been worried about how I'm going to afford all the body work that's going to need to be done. But I just have to keep reminding myself that it'll get done eventually, it'll just take a bit of patience.
Not sure if that helps or not, but just thought I'd chime in to say you're not alone.
Good luck with whatever you decide!